routing problems

[Network Pro]

hi all,

i have this routing problem. here is the topology

Speed:

Site A to Site B - 100 Mb

Site B to Site C - 2 MB

Site C to Site D - 10 mb

Site D to Site A - 100 MB

we run ospf

when i ping 192.168.1.1 (site A) from site D and tracert it takes me all the way through site C and Site B and Site A instead of using the 172.21.254.6 (directly connected)...similary if i do from Site A to SITE D it takes me all the way round instead of using hte directly connected interface..

all links are up and active. can you pls tell why this happenening and how to solve this

sh run on the interface of Site D is :

sh ip ospf interface gigabitEthernet 1/0/2  (connects to SITE A)  - cost 1

sh ip ospf interface gigabitEthernet 1/0/1  (connects to SITE C)  - cost 10

any thoughts pls?

Thanks

[Jerry Ye]

Are they all in the same area?

Regards,

jerry

[Network Pro]

yes (sorry forgot to mention)

all area 0

[JohnTylerPearce]

Have you cleared the routing process by any chance? Also, I see the OSPF cost going to the port on A from D

is set manually to 1, but what is the cost on the other interface?

[cadet alain]

Hi,

You have the 192.168.1.0 subnet on  site A and site B.

Can you do sh ip ospf database 192.168.1.0 on site D and sh run  | section router ospf on site A

Regards.

Alain.

[Network Pro]

hiya,

i think i figured out the proble. there was a passive interface command which was stopping it from advertising ospf.

as soon as i removed it, ospf started to take this route

thanks for all your help